COM 4-20

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Part Status:	Active

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Introduction

COM 4-20 is a multi-purpose structural and technical measurement and control instrument, developed by an American engineering research and development company. It has strong adaptability in application fields and is widely used in many industries. The purpose of this paper is to introduce the application field and working principle of COM 4-20.

Application Field

COM 4-20 is used in many different application fields.

Power Industry

In the power industry, COM 4-20 is used to monitor voltage, current, power supply stability, equipment over current protection and overload protection; meanwhile, it also performs data management, testing and analysis of power utilization equipment, such as intelligent power meters.

Communication Industry

COM 4-20 is applicable to the telecommunication industry and used to monitor the power supply and telecommunication signal frequencies. It can accurately detect and monitor weak signals in the field or communication centers, helping solve signal failure problems.

Automation Industry

In the automation industry, COM 4-20 is used in automatic control systems for PLC, controllers, and other types of engineering equipment. It can accurately monitor the parameters, system control operations, performance index data, and self-regulation systems of the controlled equipment, ensuring its safety.

Working Principle

COM 4-20 is based on resistance and thermal compensation principles. Through constant voltage excitation signal, the current signal flowing through resistor combines with temperature compensation method. The current signal is linear to the temperature ranging from 0°C to 50°C, thus it can be used to measure temperature. The same principle is applicable in measuring other current parameters of equipment.

Conclusion

COM 4-20 is widely used in multiple fields from power industry to communication industry and automation industry due to its strong immunity and stability. It works based on resistance and thermal compensation principles and can accurately measure current parameters of equipment. COM 4-20 is a reliable and high-performance instrument for measuring and controlling various parameters.

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